Gas-lamp.



H. HUMPHREY.

GAS LAMP APPLICATION FILED 001210, 1914 Patented Dec. 30, 1913.

. Elawewtoz 6 Wow 04/5 UNITED STATES PATENT OFFICE.

ALFRED H. HUMPHREY, OF NEW YORK, N. Y., ASSIGNOR T GENERAL GAS LIGHT COMPANY, OFKAL-AMAZOO, MICHIGAN.

GAS -LAMP.

Specification of Letters Patent.

Patented Dec. 30, 1913.

To all whom it may concern Be it known that I, ALFRED H. HUMPHREY, citizen of the United States, residing at New York city, New York, have invented certain new'and useful Improvements in Gas-Lamps, of which the following is a specification. f

This invention relates to improvements in gas lamps.

My invention relates particularly to 1mprovements in gas lamps of the indirect type, or semi-indirect type, as they are somet1mes'called, that is, lampsin which the light is directed upwardly.

.The main objects -0f this invention are:

First, to provide an improved gas lamp of the indirect type. Second, to provide' an improved'ga's lamp of the indirect type in which the arts of the lamp are so arranged that, the amp is practically shadowless. Third, to provide an improved gas lamp of the indirect type in which the parts are so arranged jas'to secure the desired supply of fresh air to the mixing tube and to the burners at the point of combustion and at the same time, one in-which the burner is protected from drafts or air currents, and the products ofcombust-ion escape without unduly heating any portion of the lamp or mterfering'with the fresh air supply to the burner. Fourt h to provide an improved gas lamp of the indirect type which is very easily cared for, that is, one in which the parts are fully accessible for cleaning and the mantle and burner parts are fully acces- I sible for adjustment and renewal as desired.

' Further objects, and objects relating tostructural details, will' definitely appear from the detailed description to follow.

I I accomplish the objects of my invention by the devices and means describedin the following specification. The. invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing formmg a part of this specification, in which:

Figure I is a top perspective viewof my proved gas lamp, e globe being omitted.

Fig. II is a detail vertical central section on a line corresponding to line 22 of Fig. III. Fig. III is a horizontal section on a line corresponding to line 33 of Fig. II. Fig. IV is an elevation view, the globe B5- and gcesing member being shown .in vertical section, the radiation of the light being indiacters refer to'similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the supply pipe 1 is adapted as a support for thelamp. The burner is provided with a supply pipe coupling 2 having a laterallyprojecting delivery arm 3. The burner is also'provided with a horizontally disposed arm 4, the mixing tube arm being below the coupling delivery arm 3. The burner tip meiiiber- 5 is disposed below the mixing tube member and provided with radially disposed urner arms 6 having inverted tips 7 thereon. The valve casing 8 is mounted upon the delivery arm 3 by means of thescrew 9 having a longitudinal-passage therein communicating with the valve casing. The valve 10 is provided with an operating, lever 11.

The details of the operating connections for the lever'to the valve form no part of my resent invention, therefore they are not furt ier described herein. It is obvious that anysuitable operating mechanism may be used in this relation.

The valve casing-S is provided with a delivery nozzle 12 delivering to the mixing tube 13 which is telescoped into the mixing tube arm 4-, the outer end of the tube being engaged upon the nipple 15 of the valve casing. Thc mixing tube is thus retained in position in the mixing tube arm of the valve mixing tube casing and is freely removable when the I valve casing is removed. A shield 16 is provided for the air inlets 17 of the mixing tube, the shield being bell-shaped and mounted on the mixing tube with itsopen end directed outwardly. The pilot burner tube l i is carried by the arm 3. The valve 18 coacts with the inner end of the mixing tube, threaded into the inner end of th tube arm- 4. See Fig. II.

The casing member 19 is flared'upwardly it being and open at the top and bottom, it being shaped quite like .an inverted lam shade. The casing member is supported by arms 20 projecting from the burner arms 5 and secured to the lower end ofthe casing mem mixing rot her by the screws .21. The arms 20 are in.

the form of straps of metal having downlow the casing. The casing member is supported by the straps in a spaced relation to all of the burners, permitting the radiation of light from the burners therebetween and the reflection of light from the inner surface of the casing. The walls of the easing shown are all in curved lines in cross section and this is the preferred form. The

'top of the casing member 19 is. of such diameter that its outer edge lies well beyond the outer end of the valve casing 8. The

casing is provided with an opening 24 for the valve operating chain or cord not shown.

' The globe25 is open at its upper end and it is supported with its 'upper edge in approximately the plane of the lower end of the casing member and 0 as to inclose the mantles 23. The globe is supported by the ring 26, suspended from the casing by the links 27. The diameter of the globe isconsiderably greater than the diameter of the lower end of the casing member so that there is'a substantial space between the upper edge-of the globe and the ,walF'of t e casing. This permits radiation of -light from the mantles between the upper edge of the globe and the casing member and also its reflection from the inner side of the globe between the globe and easing.

\Vith the casing member supported in the relation described to the burner, the radiation of'light from the burners is permitted through the top of the casing and also from below the same, and-also reflectedlight from the inner surfaces of the casing and globe. By this arrangement, I securela lamp of the indirect type whichis shadowless, the direct and the reflected rays so crossing that the light is distributed with substantial uniformity on the ceiling or surface above the lamp without shadows from any of the lamp parts. The burners are'well protected by the casing and the'globe from currents and drafts of air, and the burner parts are covered from view from below. At the same time, the lamp being so open, free radiation is permitted so that none'of its-parts become unduly heated. A free supply of air to the mixing tube and also to the burners at the point of combustion is secured uncontaminated by the products of combustion passing from the burner.

B this arrangement of parts I secure a lamp of the indirect type of high eificiency and one which is simple and economical in structure and easily cared for; also, the lamp is attractive and ornamental in appearance.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent is: a

1. The combination with the supply pipe, of an inverted burner provided with a pipe coupling having a laterally projecting delivery arm and a horizontally disposed mixing tube arm; a mixing tube projecting into said mixing tube arm; a valve casing mounted on the end of said delivery arm and provided with a nozzle delivering to said mixing tube, whereby the valve casing and the air inlet of the mixing tube are out of the path of the products of combustion; a casing member open at its top and bottom, said casing member being shaped like an inverted lamp shade; supporting arms -for said casing member projecting from said burner,

said casing member being entirely supported.

from'said supporting arms wit its upper edge substantially in the plane of said mixing tube arm and beyond the outer end thereof, thelower end of said. casing memher being in approximately the plane of the burner tip, there being a substantial space between all parts of the burner and the was ing; and a globe open at its upper end suspended from said casingmember, with its upper edge in approximatelythe plane of the; lower end of t e casing member, the diameter of the upper end of the lobe being substantially greater than the the lower end of the casing member so that there is a substantial space between the globe and easing above, whereby light may radiate from the burner through the casing and also between the globe and the casing and li ht may alsolbereflected from the inside 0 the casin and from the insi e ofthe globe through the casing and bet een the globe and easing.

atthe bottom thereof, the lower end of said casing member being inapproximatelythe iameter of i 2. The combination with the supply pipe, of

tube arm disposed horizontally elli plane of the burner tips, there being a space "between all parts of the burner and the casing; mantles carriedby the tips supported below the lower end of the casing; and a globe open at its upper end suspended from said casing.

3. The combination with the supply pipe, of an inverted burner provided with a pipe coupling having a laterally projecting de livery arm and a horizontally, disposed mixing tube arm; a mixihg tube projecting into said mixing tube arm; a valve easing mounted on the end of said delivery arm andbrovided with a nozzle delivering to said mixing tube, whereby the valve casing and the air inlet of the mixing tube are out of the path of the products of combustion; an upwardly flaring casing member open at its top and bottom; supporting arms for said casing member projecting from said burner,

the lower end of said casing member being; in approximately the plane of the burner tip,

there being also a space between all parts of the burner tip, there being a space between. all parts of the burner and the casing pen, mitting the radiation of light from the" burner therebetween and reflected from the inside of the casing; and a globe open at its upper end suspended from said casing.

4. The combination with the supply pipe, of an inverted burner provided with a pipe coupling; an upwardly flaring casing member open at its top and bottom; supporting arms for said casing member projecting from said burner, said casing member being supported with its lower edge in approximately the plane of the burner tip, there being a substantial space between all parts of the burner and the casing permitting the radiation of light from the burner therebetween and the reflection of light from the inside of the casing; and a globe open at its upper end, suspended from'said casing member, with its upper edge approximately in the plane of the lower end of the casing member, the diameter of the upper end of the globe being substantially greater than the diameter of the lower end of the casing member so that there is a substantial space between the globe and casing above through which light may radiate from the burner and may also be reflected from the inside of the globe.

5. The combination with the supply pipe, of a burner provided with a coupling; a horizontally disposed mixing tube; a valve casing connected to said coupling and provided with a nozzle delivering to said mixing tube, said valve casing and the air inlots of the mixing tube being disposed out 'of the path of the products of combustion;

- {in upwardly flaring casing member open at its top and bottom; supporting arms for ii'dwasing member projecting from said ,iriiirner, and secured to said easing at the bottom thereof, the lower end of said casing member being in approximately the plane of the burner tips, there being a space between all parts of the burner and the casing; mantles carried by the tips supported below the lower end of the casing; and a globe open at its upper end suspended from said casing.

In witness whereot, I have hereunto set my hand and seal in the presence of two witnesses.

ALFRED T'T. HUMPHREY. [n s] lVitnesses N. J. Benson, E. A. \Voons. 

